From: keith.busch@intel.com (Keith Busch)
Subject: [PATCH] NVMe: do not touch sq door bell if nvmeq has been suspended
Date: Tue, 9 Feb 2016 22:55:49 +0000 [thread overview]
Message-ID: <20160209225548.GA32064@localhost.localdomain> (raw)
In-Reply-To: <BJXPR01MB199E172F7B186281D1C7179E0D60@BJXPR01MB199.CHNPR01.prod.partner.outlook.cn>
On Tue, Feb 09, 2016@11:22:04AM +0000, Wenbo Wang wrote:
> In most cases, rcu read lock is just a preempt_disable, which is what get_cpu does. I don't see any risk.
Yes, many rcu_read_lock cases expand similarly to get_cpu. What about
the other cases?
FWIW, I don't think we'll hit the problem with the proposed rcu sync.
Heck, we don't even have a synchronize today and we don't hit the
theoretical problem.
prev parent reply other threads:[~2016-02-09 22:55 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-01 15:42 [PATCH] NVMe: do not touch sq door bell if nvmeq has been suspended Wenbo Wang
2016-02-01 15:59 ` Busch, Keith
2016-02-01 16:17 ` Wenbo Wang
2016-02-01 16:54 ` Jens Axboe
2016-02-02 7:15 ` Wenbo Wang
2016-02-02 12:41 ` Sagi Grimberg
2016-02-02 14:27 ` Keith Busch
2016-02-02 14:33 ` Sagi Grimberg
2016-02-02 14:46 ` Keith Busch
2016-02-02 17:20 ` Sagi Grimberg
2016-02-03 0:49 ` Wenbo Wang
2016-02-02 17:25 ` Keith Busch
2016-02-03 0:19 ` Wenbo Wang
2016-02-03 14:41 ` Keith Busch
2016-02-03 16:35 ` Wenbo Wang
2016-02-03 16:38 ` Keith Busch
2016-02-06 14:32 ` Wenbo Wang
2016-02-07 13:41 ` Sagi Grimberg
2016-02-08 15:01 ` Keith Busch
2016-02-09 11:22 ` Wenbo Wang
2016-02-09 22:55 ` Keith Busch [this message]
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